# Test App

## 🎯 System Overview
**Generated**: 2025-07-24 16:22:53 UTC  
**Quality Target**: 80-90% production-ready code  
**Architecture Pattern**: React frontend with Node.js backend, following enterprise patterns  
**Total Features**: 3 enterprise-grade features  

## 🏗️ Technology Stack

### Frontend: React
**Libraries & Tools:**
- Redux

### Backend: Node.js
**Language**: JavaScript  
**Libraries & Tools:**
- Express
- JWT

### Database: PostgreSQL
**Secondary Storage:**
- *Standard libraries and tools*

## 🎯 Design Principles & Quality Standards

### 1. Security First
- **Authentication**: JWT with refresh token rotation (15min access, 7-day refresh)
- **Authorization**: Role-based access control (RBAC) with permission granularity
- **Input Validation**: Comprehensive validation and sanitization on all inputs
- **Data Protection**: Encryption at rest and in transit, GDPR compliance ready
- **Security Headers**: Helmet.js, CORS, CSP, rate limiting (100 req/min per user)

### 2. Performance Excellence
- **API Response Time**: Sub-200ms for 95% of requests
- **Database Queries**: Optimized with proper indexing, connection pooling
- **Frontend Rendering**: Virtual scrolling, lazy loading, code splitting
- **Caching Strategy**: Multi-layer caching (Redis, CDN, browser cache)
- **Resource Optimization**: Minification, compression, image optimization

### 3. Maintainability & Scalability
- **Code Structure**: Clean architecture with clear separation of concerns
- **Error Handling**: Comprehensive error boundaries and graceful degradation
- **Logging**: Structured logging with correlation IDs and distributed tracing
- **Testing**: Unit, integration, and E2E test-ready architecture
- **Documentation**: Inline comments, API docs, architecture decision records

## 📋 Features Implementation Plan


### 💼 Business Features (Medium Priority)
- **Signup**: Core business logic implementation
- **Login**: Core business logic implementation
- **Userprofile**: Core business logic implementation


## 🔧 Quality Assurance Gates

- **Syntax**: 100% - Code must compile and run without errors
- **Security**: 90% - No critical vulnerabilities, comprehensive input validation
- **Architecture**: 85% - Follows established patterns, proper separation of concerns
- **Performance**: 80% - Efficient queries, proper error handling, caching strategies
- **Maintainability**: 85% - Clean code, consistent naming, inline documentation


## 🔌 API Design Standards

### RESTful Conventions
- **Resource Naming**: Plural nouns, lowercase with hyphens
- **HTTP Methods**: GET (retrieve), POST (create), PUT (update), DELETE (remove)
- **Status Codes**: Proper HTTP status codes with meaningful error messages
- **Versioning**: URL versioning (/api/v1/) with backward compatibility

### Request/Response Format
```json
// Standard Success Response
{
  "success": true,
  "data": {},
  "metadata": {
    "timestamp": "2024-01-15T10:30:00Z",
    "version": "1.0",
    "correlation_id": "uuid"
  }
}

// Standard Error Response
{
  "success": false,
  "error": {
    "code": "VALIDATION_ERROR",
    "message": "User-friendly error message",
    "details": ["Specific validation failures"]
  },
  "metadata": {
    "timestamp": "2024-01-15T10:30:00Z",
    "correlation_id": "uuid"
  }
}
```

## 🗄️ Database Design Principles

### Schema Design
- **Normalization**: Third normal form with strategic denormalization for performance
- **Constraints**: Foreign key relationships with proper CASCADE/RESTRICT policies
- **Indexing**: Composite indexes on frequently queried column combinations
- **Data Types**: Appropriate data types with proper constraints and defaults

## 🚀 Getting Started

### Prerequisites
```bash
# Node.js & npm (Backend)
node --version  # v18+ required
npm --version   # v9+ required

# Database
# PostgreSQL
psql -U postgres -c 'CREATE DATABASE myapp_dev;'
```

### Development Setup
```bash
# 1. Clone and setup backend
cd backend
npm install
npm run migrate
npm run seed
npm run dev  # Starts on port 3000

# 2. Setup frontend  
cd ../frontend
npm install
npm start    # Starts on port 3001

# 3. Setup database
# PostgreSQL
psql -U postgres -c 'CREATE DATABASE myapp_dev;'
```

## 🔄 Integration Contracts
*[This section will be populated as handlers generate code and establish contracts]*

---

**Generated by Ultra-Premium Code Generation Pipeline**  
**Quality Standard**: Enterprise-grade (8.0+/10)  
**Last Updated**: 2025-07-24 16:22:53 UTC